Nursing Elites

1. What is the feedback mechanism in the endocrine system that helps maintain hormone balance?

• A. Positive feedback, where a hormone stimulates its own release
• B. Negative feedback, where a hormone suppresses its own release
• C. Cascade effect, where one hormone triggers the release of another
• D. Dual hormone system, where two hormones work together

Correct answer: B

Rationale: In the endocrine system, negative feedback is the mechanism by which hormone levels are regulated. When hormone levels reach a certain threshold, they signal the body to stop producing more of that hormone, thus maintaining a balance. Negative feedback (option B) is the correct answer as it helps in preventing overproduction of hormones by suppressing their own release. Positive feedback (option A) would lead to an excessive production of hormones, disrupting the balance. The cascade effect (option C) involves one hormone triggering the release of another but does not directly regulate hormone levels. The dual hormone system (option D) refers to two hormones working together but does not specifically address the feedback mechanism for maintaining hormone balance.

2. Which part of the brainstem controls heart rate and breathing?

• A. Medulla oblongata
• B. Pons
• C. Midbrain
• D. Thalamus

Correct answer: A

Rationale: The medulla oblongata is a critical part of the brainstem responsible for regulating essential functions such as heart rate, breathing, and blood pressure. It houses centers that oversee these involuntary processes, making it the correct answer. The pons, midbrain, and thalamus do not primarily control heart rate and breathing, thus making them incorrect choices for this question.

3. Which word correctly completes this sentence: 'He has ____ many tasks to complete.'

• A. to
• B. two
• C. too
• D. tow

Correct answer: C

Rationale: The correct answer is 'too.' In this context, 'too' means 'excessively' or 'also,' indicating that the person has an excessive number of tasks to complete. Choice A, 'to,' is a preposition and does not fit the sentence structure. Choice B, 'two,' is a number and does not convey the intended meaning of having an excessive amount of tasks. Choice D, 'tow,' is a verb related to pulling something behind, which is completely unrelated to the sentence's context.

4. What are the five basic elements of the writing process?

• A. Prewriting, drafting, conferencing, revision, editing
• B. Brainstorming, outlining, writing, peer-review, researching
• C. Researching, prewriting, writing, brainstorming, conferencing
• D. Prewriting, writing, revising, researching, proofreading

Correct answer: A

Rationale: The correct answer is A: Prewriting, drafting, conferencing, revision, editing. In the writing process, prewriting involves planning and brainstorming ideas, drafting is the stage where you put your ideas into writing, conferencing refers to seeking feedback or discussing the work, revision involves making changes to improve the content and structure, and editing focuses on correcting grammar, punctuation, and spelling errors. The other choices are incorrect because they either include elements that are not part of the standard writing process (such as peer-review and outlining) or they mix up the order of the stages (such as researching before prewriting).

5. What accurately describes the Linnaean system of classification?

• A. It focuses on evolutionary relationships between organisms.
• B. It uses dichotomous keys for identification.
• C. It groups organisms based on shared functions.
• D. It emphasizes a hierarchical ranking system.

Correct answer: D

Rationale: The Linnaean system of classification, developed by Carl Linnaeus, is based on a hierarchical ranking system where organisms are grouped into categories based on shared characteristics. This system organizes organisms into a hierarchy of increasingly specific categories, from broad to narrow, such as kingdom, phylum, class, order, family, genus, and species. The emphasis on a hierarchical ranking system allows for systematic organization and classification of a wide variety of organisms based on their similarities and differences, making it easier to study and understand the diversity of life forms. Choice A is incorrect because the Linnaean system is not primarily focused on evolutionary relationships but rather on shared characteristics for classification. Choice B is incorrect because dichotomous keys are tools used for identifying organisms, not the fundamental basis of the Linnaean system. Choice C is incorrect as the Linnaean system categorizes organisms based on shared characteristics, not shared functions.

Similar Questions